Author: Ed Schröder
Date: 13:20:14 01/07/03
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On January 07, 2003 at 15:28:50, Tony Werten wrote: >On January 07, 2003 at 14:57:22, Russell Reagan wrote: > >>+------+------+------+------+------+------+------+------+ >>| BIT0 | BIT1 | BIT2 | BIT3 | BIT4 | BIT5 | BIT6 | BIT7 | >>+------+------+------+------+------+------+------+------+ >>| Number of | PAWN |KNIGHT| ROOK | QUEEN| KING | >>| ATTACKERS | |BISHOP| | | | >>+------+------+------+------+------+------+------+------+ >> >>Ed, >> >>On your webpage you have the above diagram. I am curious what you use bits 3-7 >>for. The reason I ask is because what if there are two queens and one knight >>attacking a square? Then the table will look like this: > >I kind of guessed that Ed's tables can go wrong if there are 3 or more attacks, >with one of them being a xray of a low piece through a high one. But this only >matters if there are at least 2 defenders (maybe at least 3). >So sometimes you include/exclude a bad/good capture (or only search it later). >Not that bad if you can replace your SEE with a table lookup. You got the point. Ed >Tony
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